Solve equations symbolically, factor and expand variable expressions, complete the square, and find anti-derivatives, computer limits and exact solutions in irrational forms with the Texas Instruments TI-89 Titanium Graphing Calculator. This versatile graphing calculator features advanced functionality and 3D graphing that makes problem-solving for AP®, advanced mathematics and engineering courses easier. Its built-in Computer Algebra System (CAS) allows you to explore and manipulate mathematical expressions in symbolic form.